<script lang="ts" setup name="XtxCarousel">
import { bannerType } from '@/types/data'
import { ref, onMounted, onBeforeUnmount } from 'vue';
// import { PropType } from 'vue';
// js 方法传递类型
// defineProps({
//   slides: {
//     type: Array as PropType<bannerType[]>,
//     required: true
//   }
// })
// ts写法
const props = withDefaults(defineProps<{
  slides: bannerType[]
  autoPlay?: boolean
  duration?: number
}>(), {
  autoPlay: false,
  duration: 3000
})

// 控制高亮
const active = ref(0)

// 左侧点击切换
const onPrev = () => {
  active.value--
  if (active.value === -1) {
    active.value = props.slides.length - 1
  }
}
// 右侧点击切换
const onNext = () => {
  active.value++
  if (active.value === props.slides.length) {
    active.value = 0
  }
}

// 定时器控制轮播图自动切换

let timer: number = -1
onMounted(() => {
  play()
})
onBeforeUnmount(() => {
  stop()
})
// 鼠标滑出自动轮播
const play = () => {
  if(!props.autoPlay) return
  timer = window.setInterval(() => {
    onNext()
  }, props.duration)
}
// 鼠标滑入停止轮播
const stop = () => {
  clearInterval(timer)
}

</script>

<template>
  <div class="xtx-carousel" @mouseenter="stop" @mouseleave="play">
    <ul class="carousel-body">
      <li class="carousel-item " v-for="(item, index) in slides" :key="item.id" :class="{ fade: active === index }">
        <RouterLink :to="item.hrefUrl">
          <img :src="item.imgUrl" alt="" />
        </RouterLink>
      </li>
    </ul>
    <a href="javascript:;" class="carousel-btn prev" @click="onPrev"><i class="iconfont icon-angle-left"></i></a>
    <a href="javascript:;" class="carousel-btn next" @click="onNext"><i class="iconfont icon-angle-right"></i></a>
    <div class="carousel-indicator">
      <span :class="{ active: active === index }" @mouseenter="active = index" v-for="(item, index) in slides"
        :key="item.id"></span>
    </div>
  </div>
</template>

<style scoped lang="less">
.xtx-carousel {
  width: 100%;
  height: 100%;
  min-width: 300px;
  min-height: 150px;
  position: relative;

  .carousel {
    &-body {
      width: 100%;
      height: 100%;
    }

    &-item {
      width: 100%;
      height: 100%;
      position: absolute;
      left: 0;
      top: 0;
      opacity: 0;
      transition: opacity 0.5s linear;

      &.fade {
        opacity: 1;
        z-index: 1;
      }

      img {
        width: 100%;
        height: 100%;
      }
    }

    &-indicator {
      position: absolute;
      left: 0;
      bottom: 20px;
      z-index: 2;
      width: 100%;
      text-align: center;

      span {
        display: inline-block;
        width: 12px;
        height: 12px;
        background: rgba(0, 0, 0, 0.2);
        border-radius: 50%;
        cursor: pointer;

        ~span {
          margin-left: 12px;
        }

        &.active {
          background: #fff;
        }
      }
    }

    &-btn {
      width: 44px;
      height: 44px;
      background: rgba(0, 0, 0, 0.2);
      color: #fff;
      border-radius: 50%;
      position: absolute;
      top: 228px;
      z-index: 2;
      text-align: center;
      line-height: 44px;
      opacity: 0;
      transition: all 0.5s;

      &.prev {
        left: 20px;
      }

      &.next {
        right: 20px;
      }
    }
  }

  &:hover {
    .carousel-btn {
      opacity: 1;
    }
  }
}
</style>